Stacie tries to show the fellow housewives where she comes from but it takes an unexpected turn when her dinner is ruined by one of her guests. Lynda is pushed to her limit when a confrontation with Michaele breaks all the D.C. rules. Mary realized that having her daughter, Lolly, move back home comes with much bigger burdens than she had expected.

Michaele and Tareq decide to join Stacie and her husband in Europe, and the two couples start to create a bond. Cat is working hard on her book and creating her cover, when disappointment suddenly strikes. The housewives come together at Mary's fashion dinner to welcome a celebrity hairstylist, but previous drama comes into the light again and the night doesn't go as planned.

Cat feels that there's more than everyone else sees with Michaele and Tareq. Lynda handles with the stress of relocation from her Georgetown condo to a huge suburban mansion to fit the needs of her grown children. Michaele wants to make things right with the rest of the ladies, so she invites them over to her winery for a grape stomp session.

A peaceful day at the vineyard turns sour for Mary once Michaele and Tareq start to make devastating accusations about her daughter. The ladies are invited to an event hosted by Edwina Rogers, and Cat decides to spice the night up.

Michaele asks for Stacie's help in finding a home in D.C. Stacie is still in search of her biological father, while her mother is of no help. Cat and Mary bond over talks of motherhood. Cat loses a dear friend and is devastated by the loss, feeling alone while her husband is out of town. Tareq has family troubles yet again and Michaele realizes it's taking a toll on her.

Cat finally puts the finishing touches on her book before sharing some of the juiciest bits with the rest of the housewives, all of which inspires Michaele and her husband to seek a lucrative Book with author Matt Carson who eventually backs away from the deal. During a fun night with the housewives and their families, an argument between Cat and Stacie's friend Erica breaks out and gets heated, bringing one of them to tears.

Michaele and Tareq Salahi attend the White House state dinner, which results in controversy for the couple. Stacie continues her search for her biological father. Lynda makes the final necessary preparations for debuting her fashion line.

In the season finale, Michaele and Tareq attend the State Dinner at the White House, and the ladies are forced to deal with the aftermath.

The ladies of D.C. reunite and tempers flare. Cat comes clean about her marriage problems. Lynda makes a shocking revelation about her habits. Stacie updates us on her situation with her birth father. The issue of race is discussed. The ladies doubt Michaele's claims that she has multiple sclerosis and that she was a Washington Redskins Cheerleaders. Part 1 ends when Andy Cohen wants to bring out Tareq Salahi and housewife Lynda speaks up and says she will not allow it unless her boyfriend, Ebong, comes out as well.

The ladies of D.C. reunite in the second part of the reunion, and bring closure to the events that unraveled during the season.